Being a (little) older than some of your potential peers would qualify you by many people's standard. Other elements looked for by some users of the term include having pursued career level employment, having family responsibilities, having served in the military, intending to take class on an alternate schedule (e.g. PT night program).

I kinda did that. I mean, I worked my way up to assistant manager at CVS/pharmacy in Boston, MA. But that was before I attended law school for the first time. After I dropped out of law school, I worked at a car and truck dealership in North Hollywood, CA. I must've sold about $ 2 million of merchandise.